Stuffing-box



(No Model I 2 Sheets-Sheet 1. L. G. S. FRICK.

STUFPING BOX- No. 518,810. Patented Apr. 24,1894;

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(No Model.) 2 Sheets-Sheet 2. L. G. S. PRIOK.

STUFPING BOX;

N0. 518,810. Patented Apr. 24, 1894.

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LOUIS O. S. FRICK, OF BUFFALO, NEW YORK.

STUFFING-BOX.

SPECIFICATION forming part of Letters'Patent No. 518,810, dated April24, 1894. Application filed November 13, 1893- Serial l lo. 490,758. (Nomodel.)

F0 whom it may concern:

Be it known that I, LOUIS O. S. FRIOK,-a citizen of the United States,residing at Buffalo, in the county of Erie and State of New York, haveinvented certain new and use ful Improvements in Stuffing-Boxes; and Ido hereby declare the followingto be a full, clear, and-exactdescription of tl1e invention, such as will enable others skilled in theart to which it appertains to make and use the same,-

June 4,1889. In such patent an oval shaped packing was employed theabruptly tapering end resting against a spring-pressed follower and thegradually tapering end resting in a tapering cavity of the bushing; Thepacking was made in two separable parts adapted when fitted together tosurround the piston-Q rod. Such packing owing to its peculiarconfiguration was non-reversible.=

The object of my present invention is to vary the shape of the packingand the parts which receive its tapering ends for the accomplishment ofimproved results and to that end it consists in providing a packing oftwo or more separable parts which when fitted together around thepiston-rod has its two tapering ends of similar configuration and hencereversible.

My invention further consists in two similar packing rings of peculiarconstruction in which the similar tapering end of the packing rests inlieu of the spring-pressed follower and bushing employed in theconstruction shown in my above named patent.

I will now minutely describe the manner in which I have carried out myinvention and then claim what I believe to be novel.

In the accompanying drawings, Figure 1 is a longitudinal sectionalelevation of my improved stufiing-box, applied to the piston-rod Fig. 2,is'a' side elevation of the metallic packing, showing the two halvesthereof separated, and also one half separated into two parts thereof.Fig. 3 is an endelevation of the halves of said packing separated.- Fig.4 shows my improved packing as applied to the stuffing box shown in myformer patent. Fig. 5 is an end view of my improved packing ring showinga dove tailed section which can be removed, thereby doing away withslipping the same over the end of the piston-rod. Fig. 6 is a side Viewof the same.

Like numerals ofreference refer to like parts on the several figures.

1 represents the head of a cylinder which is provided on its outer sidewith a cylindrical stufling-box 2, and 3 is 'thepiston-rod passingthrough the head 1 and the'stuffing-box 2.

4 shown in Fig.1 represents a gland fitting into the opening of thestuflingbox 2 and adjustably held to the latter by bolts 5 passingthrough the gland. Atightjointisformed between the gland 4 and thestuffing box 2 by means of packing rings 6 and 7 ofasbestus, rubber orother suitable material, arranged between the gland 4 and one of thepacking rings 8.

8. 8. as shown in Fig. 1

are hard metal packing rings with their outwardfaces against therubberpacking rings 7 and 9, thereby forming a tight joint. The packingrings 8 are provided with an outwardly tapering cavit T 10.

As shown in Figs. 5 and 6, 11 is a section with dove tails 12 and 13which are tapered inwardly, so as to prevent the section 11 fromslipping inwardly, thereby enabling the placing of the hard metalpacking ring 8 in its proper position, without disconnecting thepiston-rod 3 to pass it over.

14 as shown in Fig. 1, represents the packingnisgfinetalsum undin g thepiston-rod 3, and which is made equally'tapering forwardly andrearwardly. The metallic packing 14 is divided longitudinally into, twohalves or sections 15 and 16, which embrace opposite sides of thepiston-rod. The sections 15 and 16 are provided at their continuouslongitudinal divided into two sections 23 and 24:, as shown in Fig. 2,whereby tight joints are formed between these sections in like manner.

14: as shown in Fig. 1, represents the packing surrounding thepiston-rod 3, and which is tapered in like manner forwardly andrearwardly and seated with its tapering portions in the outwardlytapering cavities of the metallic packing rings 8, and whereby tightjoints are formed between the same. The packing 14 has grooves 25 on theinside as shown in Figs. 1, 2, and 4., for the purpose of having themfilled with oil from the pistonrod 3, thereby assisting in preventingthe leakage of steam or other fluids.

Myimproved form 14 of soft metal packing is shown in Fig. 4: as appliedto a stuffing-box similar in arrangement to that shown in my formerpatent herein mentioned, in which 26 represents a ring or followerarranged within the stuffing box 2, behind the packing 14, and providedwith a tapering cavity 27, which bears against the rearwardly taperingend of the packing 14.

28 is a volute spring surrounding the piston-rod and bearing with itsfront end against the rear side of the follower 26 and with its rear endagainst a recessed ring 29, arranged in the rear end of the stuffing box2.

The spring 28 presses the follower 26 against the rear end of thepacking 1& thereby forcing the latter into the tapering cavity 27, andcompressing the sections tightly around the piston-rod. The rear portionof the packing sections are compressed directly by the ring 26 embracingthe same, and the front portion of the packing is compressed by beingdriven into the tapering cavity,30 of the bushing 31. The externaldiameter of the bushing 31, as shown in Fig. 4:, is somewhat smallerthan that of the bore of the gland 32, to give the bushing a slightvertical play in the gland, so that as the piston-rod and cross head ofthe engine descend slightly by wear the bushing will take part in thesinking of the pistonrod and thereby prevent binding of the same.

33 is a ring of felt or other suitable material surrounding thepiston-rod in front of the packing, and whereby the rod is kept clean,serving at the same time as a lubricator. The ring 33 bears against theouter end of the bushing 32 and against'an annular shoulder 34, near theouter end thereof, and is held in its seat by the retaining plate 35,secured to the outer end of the gland 32. The opening 36 in theretaining plate 35 is somewhat larger than the piston rod 3 as shown, toallow the rod to descend slightly as the cross head of the enginebecomes worn.

Upon removing the nuts of the bolt 5, (see Fig. 1,) the gland can bemoved on the piston rod away from the end of the stuffing box 2, and thepacking sections 15 and 16 can be removed when worn and be replaced bynew sections if required.

It will be observed that the metallic packing 1a can be readily renewedwhen it is re quired, or when slightly worn it can be given space forwear by filing the surfaces 17, 18, 19, 20, 21, and 22, as shown inFigs. 2 and 3, and again continue its wear, and by reason of itstapering ends being of similar configuration it can be reversed at willupon the piston rod to insure an even wearing of. parts.

1. In a stufiing box for engines, thecombination with the conicalpacking; of the hard metal packing ring provided with an outwardlytapering cavity for the packing and comprising a main section having aradial opening, and a removable section with dove tails at its sidesengaging grooves in the sides of said opening, as and for the purposeset forth.

2. In a stuffing box forengines, the combination with the conicalpacking; of the hard metal packing ring provided with an outwardlytapering cavity for the packing and comprising a main section having aradial opening, and a removable section with dove tails at its sidesengaging grooves in the sides of said opening, said dove tails andgrooves tapering inwardly, as and for the purpose set.

forth.

3. In a stuffing-box for engines, the combination with a soft metalreversible packing consisting of two longitudinally separable halveswhich when fitted around the pistonrod has its two tapering ends ofsimilar configuration, of a retaining gland and two hardmetal packingrings having tapering cavities for the reception of the tapering ends ofthe soft-metal packing such packing rings having removable sections withdovetails'at their sides, substantially as and for the purpose stated.

1. In a stuffing-box for engines the combi nation with a soft-metalreversible packing consisting of longitudinal halves each composed oftransversely separable sections; of a retaining gland and two hard-metalpacking rings having cavities for the reception of the ends of the softmetal packing, such packing rings having dovetailed removable sectionssubstantially as and for the purpose stated.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

LOUIS C. S. FRICK.

' Witnesses:

W. T. MILLER, O. E. IloDDIok.

